66433872 has 40 divisors (see below), whose sum is σ = 173560320. Its totient is φ = 21894400.

The previous prime is 66433853. The next prime is 66433877. The reversal of 66433872 is 27833466.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66433872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3504 + ... + 12047.

It is an arithmetic number, because the mean of its divisors is an integer number (4339008).

Almost surely, 2^66433872 is an apocalyptic number.

It is an amenable number.

66433872 is an abundant number, since it is smaller than the sum of its proper divisors (107126448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66433872 is a wasteful number, since it uses less digits than its factorization.

66433872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15651 (or 15645 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 66433872 is about 8150.6976388528. The cubic root of 66433872 is about 405.0076145497.

The spelling of 66433872 in words is "sixty-six million, four hundred thirty-three thousand, eight hundred seventy-two".